题目内容
计算:(
+1)(
-1)=______.
+
-2
=______.
| 3 |
| 3 |
| 8 |
|
|
(
+1)(
-1)=(
)2-1=3-1=2;
+
-2
=2
+
-
=
+
.
故答案为:2,
+
.
| 3 |
| 3 |
| 3 |
| 8 |
|
|
| 2 |
| ||
| 3 |
| 2 |
| 2 |
| ||
| 3 |
故答案为:2,
| 2 |
| ||
| 3 |
练习册系列答案
相关题目
题目内容
| 3 |
| 3 |
| 8 |
|
|
| 3 |
| 3 |
| 3 |
| 8 |
|
|
| 2 |
| ||
| 3 |
| 2 |
| 2 |
| ||
| 3 |
| 2 |
| ||
| 3 |